Link the Red Boosters to be converted in +1XP for the SAs and NPs we train -not for attributes, cuz it should be random or so xD-

So, we can spend these loads of "K's" red boosters stuck...

too these could be converted in something more special and rare, healing condition+morale+ 100% of a injury........ so people could have more ways to booster health.....
even in live matches could be used to heal what we can call "minor injuries" attending the match so could be cool... as it happens in real life, not all players leave the field after a tackle, some just need a little cure.

etc.